E F Johnson Company 2425M70 Benutzerhandbuch

5-15

The radio can send GPS data in conventional digital mode only. Refer to paragraph 6.16 
for more information.

OTAP is an “Over the Air” programming feature for the subscriber parameter (code plug) 
files. Using the OTAP feature, parameter files can be updated and changed in the field, 
eliminating the need to take the radio out of service to perform the updates. OTAP 
requires conventional P25 data infrastructure. It is not supported in P25 Trunking. 
Firmware updates cannot be made using this feature. Firmware version 6.6.x (ES) or later 
is required to use this feature.

The current profile in the radio controls how an OTAP download is handled. How this is 
set in Armada determines the possible actions the radio should take: “Prompt”, “Activate”, 
and “Off-line”.

Prompt

- the radio displays the message “ACTIVATE?” after a successful OTAP download, 

prompting the radio user to respond. 

- On mobile subscriber units, the user should press the Select button to indicate an 

affirmative answer or the <F6> button (<F5> on the Lightning control head) to 
indicate a negative answer. The radio user has 30 seconds to answer. An affirmative 
answer stores the parameters in the EEPROM and resets the radio; a negative answer 
or no answer results in the parameters remaining in the Flash memory for activation 
at a later time, but also resets the radio.

Activate

- the new parameters are automatically written to the EEPROM upon a successful 

download. The user sees a display of “ACTIVATING” followed by a reset of the 
radio.

Off-line

- the parameters are stored in Flash memory until activated with Armada or by the 

radio user. The activation method for the radio requires having either a menu item or 
a button assigned to the “Activate OTAP” function. The download completion action